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    <title>【BLUR】事件 - 有 tabindex</title>
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  <body>
    <div tabindex="-1">
      <div class="parent">
        <a href="#" tabindex="0">test link</a>
        <div style="padding: 30px" class="bg">
          <p>test content</p>
        </div>
        <a href="#" tabindex="0">test link2</a>
        <div style="padding: 20px" class="bg">
          <p>test content</p>
        </div>
      </div>
    </div>
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